AUSA 2014: Sikorsky unveils S-97 prototypes

The first two S-97 Raider helicopter prototypes have been unveiled by Sikorsky, ahead of commencement of the programme’s test flight activities. The aircraft has been in development since 2010.

The S-97 is a multi-mission rotorcraft utilising Sikorsky’s X2 rotor coaxial design.  It can be configured for armed aerial scout or light assault, and is capable of carrying six troops and external weapons. The coaxial counter-rotating main rotors and pusher propeller provide cruise speeds up to 220 knots (253 mph) - more than double the speed of conventional helicopters.

The company has developed the Raider as a replacement for the US Army's OH-58D Kiowa Warrior helicopter fleet based on the force’s future operational and financial priorities - although that programme now looks unlikely to progress - and for the special operations platform. A similar coaxial design is also the basis for Boeing and Sikorsky's bid for the army's Joint Multirole Technology Demonstrator.

Mick Maurer, president of Sikorsky, said: ‘Military rotorcraft fleets need maximum performance and increased capabilities to achieve their objectives. The Raider delivers on that with its greatly improved manoeuvrability and speed, significantly improved high/hot hover performance, and greater range and endurance.'

Mark Miller, vice president of research and engineering, Sikorsky, added: ‘Raider marks the first unveiling of a new relevant rotorcraft configuration in 30 years. With the Raider programme, Sikorsky has brought innovation to every aspect of the process, rethinking the way we design, build, test and support the product.

'We've kept a close eye on lowering development, production and support costs while increasing productivity and quality, and we are confident that the Raider is the solution for the future warfighter. We are looking forward to getting air under its tires and expanding the envelope in flight test in the coming months.’

The single-engine Raider features a composite airframe and a maximum gross weight of slightly more than 11,000lbs. The aircraft will be capable of carrying an array of weapons and sensors, necessary for the mission. The cockpit will fit two pilots, seated side-by-side. The flexible cabin space will carry up to six combat-equipped troops, or additional fuel and ammunition for extended missions.